Tire and method of making the same



g- 2, 1932- F. c. ROGERS ET AL 1,369,620

TIRE AND METHOD OF MAKING THE SAME Filed Aug. 16, 1929 JNTENZbEFPatented Aug. 2, 1932 I i UNITED STATES PA ENT OFFICE FRANCIS O.BOGERSAND BTGAY, OF IAKRON, OHIO, ASSIGNORS TO THE B. GOOTDRICI-ICOMPANY, OENEW YORK, N. Y., A CORPORATION OF NEW YORK TIRE AND METHODorMarmara THE SAME Application filed Aa us tie, 1929; semi o; 386,345.

This invention relates to tires and methods core may be used, the lattertype being shown of making the same, and more especially to in Fig. 2and comprlsing respective sections the construction .and manufacture oflow 15, of such size and shape as to permit of pressure tires of largecross-section and small their easy removal from the finished tire. v

5 rim diameter such as are advantageously used With the assembled coremounted upon the on the landing gearand tail skids ofairusual rotatablespindle (not shown), the craft, fabric ply 12 is mounted upon the core,said The manufacture of tires of the character ply preferably being inthe form of an end mentioned by the usual tire-building methods lessband the diameter of which is substan- 10 presents numerousdifliculties, among which tially the same as theneutral diameterof isthe difficulty of working the marginal the 'core, so that the bandrequires to be portions of the bands of tire-building matestretched overthe core, whereupon it assumes rial about the relatively small beadportions substantially the shape shown in Fig. 3. The

I of the tire, and it is to this problem that this band may then berolled down or stitchedto 15 invention is directed. the core from thecrown to the neutral diam- The chief objects of the invention are toeter of the core, after which the free lateral provide an improved tireof the character portions of the band are cut or slit, parallel tomentioned; and to provide a method for ecothe cords, at spaced-apartpoints, from the nomically and expeditiously making the respective edgesof the saidlateral portions 26 same. substantially to the junctureof'the latter with Of the accompanying drawing: the core. The slits,which may conveniently Fig. 1 is a side elevation of a tire conbe madeby simply tearing the fabric, are structed according to our invention inits indicated by broken lines 16, 16,Fig. 3, and

I preferred form, parts being broken away and the individual strips ortabs thus formed are 25 a part being in section. designated 17 17 Fig. 2is a sectional perspective View of a The tabs 17 on each side of thecore are portion of the tire in the process of being then applied to thecore in succession in such built, and a tire-building form on which it'amanner that each tab overlies the precedis built. ing tab about halfits width at a point sub- 119 Fig. 3 is an edge view of the tire, on astantially at the inner periphery of the tire, smaller scale,representing one stage of its and in turn is 'so overlaid by the nextsucmanufacture. ceeding tab, as is most clearly shown in :Fig.

Referring to the drawing, we show at 10 1. 7 Thus the single fabric band12 presents a a tire comprising bead-rings 11, 11, an inner singlethickness at the crown of the tire and L3 fabric ply 12, an outer fabricply 13, and a a double thicknessat the inner periphery relatively thinrubber cover 14 which is somethereof, which double thickness extendswhat thicker at the tread portion of the tire.v radially toward theneutral diameter of the The fabric plies 12, 13 comprise rubberized tireinan annular series of gore-like or weftless or weak-wefted cord fabricand are tapered patterns on each side of the tire.

40 bias laid with the cords of one ply disposed at The tire-beads 11 arethen mounted upon the an angle to the cords of the other plyaccordopposite sides of the tire over the fabric ply ing to well-knowntire construction. As is 1'2 and the latter folded onto the innerperiphclearly shown in Fig. 2, our invention procry and outer face ofeachbead to provide vides two plies of fabric under the beads 11 atwo-ply covering therefor as shown in and four plies over the beads andextending Fig. 2. 3 i

therefrom onto the side walls of the tire, Next the-outer fabric ply 13is mounted said four plies being integral parts of the upon the tirecore with its cords disposed at two plies 12,13. an angle to the cordsof the ply 12, and-is In the manufacture of the tire, a frangible,similarly slit in its lateral portions to pro- 59 collapsible, orknock-clown building form or vide'tabs 1'8, 18 thereat. The tabs 18 areapplied to the tire in the manner of the tabs 17, being overlaid uponeach other to provide double thickness of the ply 18 over the outer faceof the tire beads and on their inner peripheries to the toes of thebeads. The cover ply 14 is then applied to the tire, after which thetire is vulcanized. vulcanization may be effected while the tire remainson the building core, or the latter may be removed and an expansiblecore substituted.

The arrangement by which we obtain double ply thickness over the beadsmakes for strength at these points without increasing the weight of thetire, and the slitting of the fabric plies to form integral tabs permitsthe latter to be applied to the inner peripheral region of the tireeasily and smoothly with out such folding and buckling as would occur ifthe tire band were compressed and applied to the core by the use ofstitcher rollers in the usual manner.

Our invention may be modified within the scope of the appended claims.

We claim:

1. A tire casing including a ply of reinforcing fabric which has itsmarginal portions formed with a plurality of integral tabs which extendto the inner periphery of the tire.

2. A tire casing as defined in claim 1 in which the tabs overlap eachother at the inner periphery of the tire.

3. ,A tire casing including a ply of cord fabric which has its marginalportions formed with integral tabs, whose lateral margins are parallelto the fabric cords.

4. The method of making tires which comprises applying a strip oftire-building fabric circumferentially to a tire-building form at thecrown thereof, providing the lateral portions of the strip with integraltabs, applying said tabs to the form, and then completing the buildingof the tire.

5. The method of making tires which comprises mounting an endless bandof tirebuilding fabric upon a tire-building form at the crown thereof,slitting the lateral portions of the band to form integral tabs thereon,applying said tabs to the form, and then completing the building of thetire.

6. A method as defined in claim 5 in which the endless band comprisescord fabric and is slit parallel to the cords thereof.

7. The method of making tires which comprises applying a strip oftire-building fabric circumferentially to a tire-building form at theouter periphery thereof, forming integral marginal tabs on the lateralportions of said strip, applying said tabs to the form in overlappingrelation to each other, and then com- I pleting the building of thetire.

8. A method as defined in claim 7 in which the tire-building fabric iscord fabric and the tabs are formed by slitting the same parallel to thecords thereof.

9. A tire casing, including a ply of parallellaid angularly disposedcords, said ply having its central longitudinal portion progressivelyelongated to form it to toric shape and its marginal portions slittedbetween adjacent cords to provide radially extending tabs which arearranged in overlapping relation with the cords in successive tabscrossing each other to form thickened side wall and beadenclosingportions of the tire.

10. The method of making tires which com--

